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Full text of "Handbook Of Chemical Engineering - I"

POWER GENERATION AND TRANSMISSION
49
without permitting the escape of steam as such. Both bucket traps and expansion traps are available. Steam separators remove moisture from the current of steam. Oil separators or grease extractors remove moisture and oil. They should be used on exhaust lines from reciprocating engines and pumps to heating systems, etc. All separators require traps.
Piping Design.—Expansion must be controlled and allowed for. It may be as much as 3 in. per 100 ft. of pipe length. Expansion joints are to be avoided. They are available in both the packed stuffing box and corrugated types. The best method (though limited in application) of providing for expansion is by pipe lends. These also decrease the heat emitting surface, reduce the number
TABLE OF PROPERTIES OF SATURATED STEAM*
Pres: sure in	Tempera-	Total heat in heat units above 32°F.		Heat4 of vaporization of	Density or weight	Volume	Factor of equiv-
pounds per square inch	ture, Fahrenheit	In the steam (//)	In the water (A)	latent heat (L) in heat units	in pounds of 1 cu. ft.	in cubio feet of lib.	alent evaporation at 212°F.
1	101.99	1113.1	70.0	1043.0	0.00299	334.5	0.9661
2	126.27	1120.5	94.4	1026.1	0.00576	173.6	0.9738
3	141.62	1125.1	109.8	1015.3	0 . 00844	118.5	0.9786
4	153.09	1128.6	121.4	1007.2	0.01107	90.33	0.9822
5	162.34	1131.5	130.7	1000.8	0.01366	73.21	0.9852
6	170.14	1133.8	138.6	995.2	0.01622	61.65	0.9876
7	176.90	1135.9	145.4	990.5	0.01874	53.39	0.9897
8	182.92	1137.7	151.5	986.2	0.02125	47.06	0.9916
9	188.33	1139.4	156.9	982. 5	0.02374	42.12	0.9934
10	193.25	1140.9	161.9	979.0	0.02621	38.15	0.9949
15	213.03	1146.9	181.8	965.1	0.03826	26.14	1.0003
20	227.95	1151.5	196.9	954.6	0.05023	19.91	1.0051
25	240.04	1155.1	209.1	946.0	0.06199	16.13	1.0099
30	250.27	1158.3	219.4	938.9	0.07360	13.59	1.0129
35	259.19	1161.0	228.4	932.6	0.08508	11.75	1.0157
40	267.13	1163.4	236.4	927.0	0.09644	10.37	1.0182
45	274.29	1165.6	243 . 6	922 0	0.1077	9. 285	1.0205
50	280.85	1167.6	250.2	917.4	0.1188	8.418	1.0225
55	286.89	1169.4	256.3	913.1	0.1299	7.698	1.0245
60	292.51	1171.2	261.9	909.3	0..1409	7.097	1.0263
65	297.77	1172.7'	267.2	905.5	0.1519	6.583	1.0280
70	302.71	1174.3	272.2	902.1	0.1628	6.143	1.0295
75	307.38	1175.7	276.9	898.8	0.1736	5.760	1.0309
80	311.80	1177.0	281.4	895.6	0.1843	5.426	1 . 0323
85	216.02	1178.3	285.8	892.5	0.1951	5.126	1.0337
90	320.04	1179.6	290.0	889.6	0.2058	4.859	1.0350
95	323.89	1180.7	294.0	886.7	0.2165	4.619	1.0362
100	327.58	1181.9	297.9	884.0	0.2271	4.403	1.0374
105	331.13	1182.9	301.6	881.3	0.2378	4.205	1.0385
110	334.56	1184.0	305.2	878.8	0.2484	4.026	1.0396
115	337.86	1185.0	308.7	876.3	0.2589	3.862	1.0406
120	341.05	1186.0	312.0	874.0	0.2695	3.711	1.0416
125	344.13	1186.9	315.2	871.7	0.2800	3.571	1 . 0426
130	347.12	1187.8	318.4	869.4	0.2904	3.444	1.0435
140	352.85	1189.5	324.4	865.1	0.3113	3.212	1 . 0453
150	358.26	1191.2	330.0	861.2	0.3321	3.011	1.0470
160	363.40	1192.8	335.4	857.4	0.3530	2.833	1 . 0486
170	368.29	1194.3	340.5	853.8	0.3737	2.676	1 . 0502
180	372.97	1195.7	345.4	850.3	0.3945	2.535	1.0517
190	377.44	1197.1	350.1	847.0	0.4153	2.408	1.0531
200	381.73	1198.4	354.6	843.8	0.4359	2.294	1.0545
225	391.79	1201.4	305. 1	836.3	0.4876	2.051	1 . 0576
250	400.99	1204.2	374.7	829.5	0.5393	1.854	1 . 0605
275	409.50	1206.8	383.6	823.2	0.5913	1.691	1 . 0632
300	417.42	1209.3	391.9	817.4	0.644	1.553	1 . 0657
325	424.82	1211.5	399.6	811.9	0.696	1.437	1.0680
350	431.90	1213.7	406.9	806.8	0.748	1.337	1.0703
375	438.40	1215.7	414.2	801.5	0.800	1.250	1.0724
400	445.15	1217.7	421.4	796.3	0.853	1.172	1 . 0745
500	466.57	1224.2	444.3	779.9	1.065	0.939	1.0812
i KENT, "Mechanical  Engineer's Pocket-Book,"   New York, 1913, p. 836.